Is CVE-2021-34993 actively exploited?

Yes. CVE-2021-34993 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, which means exploitation in the wild has been confirmed.

Can CVE-2021-34993 be exploited remotely?

The attack vector of CVE-2021-34993 has not been classified yet.

What is the CVSS score of CVE-2021-34993?

CVE-2021-34993 has not received a CVSS score yet.

HOME VULNERABILITIESCVE-2021-34993

UNKNOWNCISA KEVIN THE WILD

CVE-2021-34993

Published: April 11, 2026

EPSS:0.46%probability of exploitation in 30 daysPercentile:64.4th

Official Description

This vulnerability allows remote attackers to bypass authentication on affected installations of Commvault CommCell 11.22.22. Authentication is not required to exploit this vulnerability. The specific flaw exists within the CVSearchService service. The issue results from the lack of proper validation prior to authentication. An attacker can leverage this vulnerability to bypass authentication on the system. Was ZDI-CAN-13706.

NVD Source

Technical Analysis

CVE-2021-34993 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

CISA has added CVE-2021-34993 to the Known Exploited Vulnerabilities (KEV) catalog, confirming active exploitation in the wild. U.S. federal agencies are required to patch this within the mandated timeframe, and all organizations should treat remediation as urgent.